Cement mixer



FIG. 1 is a perspective view of a cement mixer showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is an end elevational view thereof;

FIG. 4 is a side elevational view thereof the opposite side being amirror image; and

FIG. 5 is an end elevational view thereof, the opposite side of FIG. 3.

The ornamental design for a cement mixer, as shown.